<template>
  <el-container class="home-container">
    <!--头部布局-->
    <el-header>
      <div>
        <img
          src="../assets/yhzc.png"
          class="logo_img"
        />
        <span>Demo演示平台</span>
      </div>
      <el-button
        type="info"
        @click="loginexit"
      >安全退出</el-button>
    </el-header>
    <el-container>
      <!--侧边布局-->
      <el-aside width="200px">
        <el-menu
          background-color="#545c64"
          text-color="#fff"
          active-text-color="#409eff"
          :router="true"
          :default-active="activePath"
        >
          <!-- 一级菜单 -->
          <el-submenu :index="item.id+''" v-for="item in menuList" :key="item.id">
            <template slot="title">
              <i :class="iconsObject[item.id]"></i>
              <span>{{item.title}}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item :index="it.path+''" v-for="it in item.slist" :key="it.id" @click="saveNavState(it.path+'')" >
              <i :class="iconsObject[it.id]"></i>
              <span slot="title">{{it.title}}</span>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!--主体布局-->
      <el-main>
          <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>
<script>
export default {
  data() {
    return {
      // 左侧菜单
      menuList: [],
      iconsObject: {
        100: "iconfont iconguanliyuan",
        200: "iconfont iconsport",
        101: "iconfont icondenglu",
        102: "iconfont iconmima",
        103: "iconfont iconsport",
        104: "iconfont iconshangpin",
        201: "iconfont iconshu",
        202: "iconfont iconkaluli",
        203: "iconfont iconshiwu",
        204: "iconfont icondenglu",
      },
      activePath:'',
    };
  },
  // 类似onload
  created() {
    this.getMenuList();
    //取出session
    this.activePath = window.sessionStorage.getItem('activePath');// 取出session里的访问路径
  },
  methods: {
    loginexit() {
      window.sessionStorage.clear(); //清除session
      this.$router.push({ path: "/login" }); //页面路由跳转
    },
    // 获取所有的导航菜单
    async getMenuList() {
      const { data: res } = await this.$axios.get("menus");
      console.log(res);
      if (res.status != 200) return this.$message.error("操作失败！！！");
      this.menuList = res.data; //数据回填
    },
    // 保存二级菜单的路径
    saveNavState(activePath){
      window.sessionStorage.setItem('activePath',activePath);// 存放点击的二级菜单
      this.activePath = activePath;// 给点击的菜单添加高亮
    },
  },
};
</script>
<style lang="less" scoped>
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between; // 左右贴边
  padding-left: 0%; // 左边界
  align-items: center; // 水平
  color: #fff;
  font-size: 20px;
  > div {
    //左侧div加布局
    display: flex;
    align-items: center;
    span {
      margin-left: 15px;
    }
  }
}
.el-aside {
  background-color: #333744;
  .el-menu {
    border-right: none; // 对其右边框
  }
}
.el-main {
  background-color: #eaedf1;
}
.home-container {
  height: 100%;
}
.logo_img {
  width: 20%;
  height: 100%;
}
.iconfont {
  margin-right: 10px;
}
.toggle-button {
  background-color: #4a5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer; // 显示鼠标指针为：小手
}
</style>